The unprecedented hurricanes come as a study finds climate change is driving the mass extinction of parasites that are critical to natural ecosystems, and could add to the planet’s sixth great mass extinction event that’s currently underway. The report in the journal Science Advances warns that about a third of all parasite species could go extinct by 2070 due to human activity. The loss of species of lice, fleas and worms could have profound ripple effects on the environment and might pave the way for new parasites to colonize humans and other animals with disastrous health outcomes.